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Javascript – How can I recursively search all global variables for a string?

On any modern website there are a lot of global variables of complex configuration. Some are simple strings or dates, some will be objects or arrays.

I want to search for the string hello to see if it is the value of any global variable, including nested properties/values.

For example, say this was a global variable:

nacho = {
    "a" : "one",
    "b" : [
        { "d" : "yes", "e" : "no" },
        { "d" : "alpha", "e" : "bravo" },
        { "d" : "hello", "e" : "bye" },
        { "d" : "charlie", "e" : "delta" },
    ],
    "c" : "two"
}

Then searching for hello should find nacho.b[2].d;

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2

Answers


  1. 0

    Here is one way you can do that regarding your specific example:

    https://playcode.io/1789958

    Note: a stack snippet was not working due to it being a sandboxed environment, this is because we are referencing the window object.

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  2. 0

    -> You can try this Code :-

        function searchGlobalVariables(value, obj, path = []) {
    // Check if the current object is an array
    if (Array.isArray(obj)) {
        // Iterate through the array elements
        obj.forEach((element, index) => {
            // Recursively search within each array element
            searchGlobalVariables(value, element, path.concat(index));
        });
    } else if (typeof obj === 'object' && obj !== null) {
        // If the current object is an object (non-null), iterate through its properties
        Object.entries(obj).forEach(([key, val]) => {
            // Recursively search within each property value
            searchGlobalVariables(value, val, path.concat(key));
        });
    } else if (obj === value) {
        // If the current value matches the search value, print the path to it
        console.log(`Found value "${value}" at ${path.join('.')}`);
    }
}

// Example global variable
nacho = {
    "a": "one",
    "b": [
        { "d": "yes", "e": "no" },
        { "d": "alpha", "e": "bravo" },
        { "d": "hello", "e": "bye" },
        { "d": "charlie", "e": "delta" },
    ],
    "c": "two"
};

// Search for the value "hello"
searchGlobalVariables("hello", window);
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